Ronix Floating Fins Toolless Centre Surf Fin | 3.0 | 2021  The new Ronix Floating Fins Toolless Centre Surf Fin 3.0 is one of the most simplistic easy to use tool-less fin systems. A centre spring load so you can put the fin on flat without having to apply added pressure to the front or back of a fin like most other fin setups. Combined with a lightweight strong fibreglass epoxy constructed fin for added drive and the least in friction with the water. Light, durable and performance inspired.